Secondary battery
The secondary battery design with a porous tape on the electrode assembly surface effectively blocks large foreign substances and maintains electrolyte flow, addressing internal short circuits and ensuring battery performance by preventing foreign substance entry.
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Patents(United States)
- Current Assignee / Owner
- SANYO ELECTRIC CO LTD
- Filing Date
- 2021-02-08
- Publication Date
- 2026-07-07
AI Technical Summary
Secondary batteries are prone to internal short circuits due to conductive foreign substances, particularly metal foreign substances, which can pierce the separator and cause short circuits by depositing on the electrode plates, leading to battery performance degradation.
A secondary battery design featuring a porous tape attached to the outermost surface of the wound electrode assembly, spanning the separator and electrode core exposure parts, prevents foreign substances from entering while allowing electrolyte solution flow, using a nonwoven fabric with specific basis weight and fiber diameter to capture foreign particles effectively.
Prevents internal short circuits and ensures uniform electrolyte distribution, maintaining battery performance by blocking large foreign substances while allowing electrolyte access, thus preventing lithium deposition and charge-discharge inefficiencies.
Smart Images
Figure US12676334-D00000_ABST